You do listen to people you “don’t know”?
It’s called Influencer Marketing.  
Endorsements are a part of about 20% of all advertising.

Some brands dump huge money into a celebrity endorsement.   

My pondering today for you my LinkedIn family:  
Who do you trust more?

— The TV, movie or sports star telling you the brand of clothing to buy?
— The few dozen people who left a restaurant review you want to try?
— Or the unnamed person who posts a sign saying the other steps have less ice?